Deleting an Interface/IP Address

When an IP address or an interface is used in a configuration item, that configuration has to be changed before the IP address or interface can be removed. The error messages are not very clear as to where the configuration exist so here are a list of configuration areas to check.

Network » Configuration » Link Load BalancingIf a pool has been created that includes the IP or interface, the pools will have to be reconfigured before the IP address can be removed. See the help topic, Creating and assigning link load balancing pools.

Network » Configuration » DNSThe DNS settings can also reference an interface or IP address. Check here if the IP address or interface that is giving an error is in use and change the configuration. See the help topic, Adding new DNS forwarders or hosts.

Network » Configuration » Port forwardsExisting port forward configurations using the IP address will have to be changed before the IP address can be removed. See the help topic, Adding port forward rules.

Bandwidth » Control » InterfacesIn the bandwidth module, any interfaces setup using the IP address will have to be changed or removed before the IP address can be deleted. See our help topic, Creating new bandwidth limits for interfaces.

Network » Firewall » Smoothwall accessIn the Smoothwall access rules, any rules here specifically listing the IP address or interface has to be changed or deleted. See our help topic, Adding new Smoothwall access rules.

Network » Routing » SubnetsFinally any static rules using the interface or IP address will need to be removed as well. See our help topic, Creating subnet rules.

That should be all the configurations that can interfere with the removal or editing of existing interfaces. If an IP address is changed, these steps should not be needed but removal will require existing configuration being adjusted so this IP/interface is no longer in active use.